STRING WOUND SEDIMENT FILTER
DESCRIPTION
String
wound sediment
filter
cartridges
are
structured
with loose
outer
layers
and
tight
inner
layers
which
can
offer
true
depth
filtration
for
high
dirt
holding
capacity
and
extremely
low
media
migration
to
ensure
temperature
and
chemical
compatibility.
The
main
advantage
of the
string
wound
filter
is
its
exceptionally
high structural
strength;
therefore,
they can withstand
severe
operating conditions.

Features

Fits
all
the
standard
housings
Low-pressure
drop,
high
dirt
holding
capacity
, and
long
service
life
Loose
outer
layers
and
tight
inner
layers
offer
effective
depth
filtration
Various
filter
media
fit
with
various
applications
Applications Of The String Wound Sediment Filter

Food
&
Beverage
Semiconductor
Pharmaceuticals
Electric
Plating
DI
&
RO
pretreatment
Specifications Of The String Wound Filter

Filter
media:
Polypropylene,
Fibrillated
Polypropylene,
Cotton,
Glass
Fibre
Outside
diameter:
55mm,
61mm,
63mm,
65mm,
115mm
Inner
diameter:
28mm,
30mm
Length:
10″,
20″,
30″,
40″
Micron
Rating
(micron):
5,
10,
20,
30,
50,
75,
100
Polypropylene
material
for
non-organic
solvent,
maximum
recommended Operating
temperature
<70
degrees
C
Bleached
cotton
material
filter
cartridge
with
stainless
core
applies
to
organic solvent,
water,
oil,
alkalinity
solvent,
beverage,
pharmaceuticals,
maximum
Recommended
operating
temperature:
120
degree
C.
The latest development in string-wound cartridges has overcome problems with roving and friction-spun yarns and has all the features of melt-blown cartridges. The media of the new string-wound cartridge is made from the continuous filaments-each individual filament that continues throughout the entire length. There are no short fibers, making the cartridge free from any media migration. These continuous filaments are melt-spun in a way that no chemicals like spin-finish, wetting, and antistatic agents, surfactants, emulsifiers, etc., are required. These chemical-free continuous filaments are then randomly oriented to each other, intermixed, looped, and entwined forming a non-round, highly stable, bulky yarn.

Random short loops protrude from the surface of the yarn. As the filter is wound, every single yarn traps part of the loops of the adjacent yarn giving a highly stable structure. The yarns get locked in place and will not roll or move aside. This stable structure also gives excellent sealing. It easily passes the paper clip test. Yarn that doesn’t shift easily also makes the filter resistant to particle unloading. With advancements in winding technology (computer controls) and pitch, the number of crossings and space between each yarn can be continuously varied and controlled from start to finish of the cartridge winding. The inner layers of yarn can be wound closer together and the distance between the yarns can be gradually increased toward the outer layers. This achieves density grading without changing the winding tensions for more consistent performance in string-wound cartridges. Coarser particles are trapped in the outer layers and finer particles in the inner layers. In this cartridge, the liquid flows through the entire yarn structure-there are no typical diamond-shaped holes.